JP2012192095A5 - - Google Patents
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- JP2012192095A5 JP2012192095A5 JP2011059693A JP2011059693A JP2012192095A5 JP 2012192095 A5 JP2012192095 A5 JP 2012192095A5 JP 2011059693 A JP2011059693 A JP 2011059693A JP 2011059693 A JP2011059693 A JP 2011059693A JP 2012192095 A5 JP2012192095 A5 JP 2012192095A5
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- fundus
- split index
- image
- optical system
- focusing lens
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(1) 被検者眼の眼底を照明するための眼底照明光学系と、前記眼底に対して一対の光学的なスプリット指標を投影するスプリット指標投影光学系と、駆動機構により光軸方向に移動可能なフォーカシングレンズが光路中に配置され、前記スプリット指標投影光学系により前記眼底に投影された前記スプリット指標像と眼底像とが撮像される撮像素子を備える眼底撮影光学系と、前記撮像素子の出力信号から前記スプリット指標像の分離状態を検出し、前記検出した結果に基づき前記駆動機構を駆動させてフォーカシングレンズを光軸方向に移動させることで前記眼底のフォーカス合わせを行う制御手段と、を備える眼底撮影装置において、前記スプリット指標像の検出のために用いられる前記撮像素子上の局所領域を,前記フォーカシングレンズの位置に対応付けた検出範囲位置情報として記憶する記憶部を備え、前記制御手段は、前記フォーカシングレンズの位置と前記記憶部に記憶された前記検出範囲位置情報とに基づき,前記撮像素子上での前記スプリット指標像の検出範囲を設定することを特徴とする。
(1) A fundus illumination optical system for illuminating the fundus of the subject's eye, a split index projection optical system for projecting a pair of optical split indices onto the fundus, and a drive mechanism that moves in the optical axis direction A fundus photographing optical system comprising an imaging element in which a possible focusing lens is disposed in an optical path and the split index image and the fundus image projected onto the fundus by the split index projection optical system ; Control means for detecting the separation state of the split index image from an output signal, and driving the drive mechanism based on the detection result to move the focusing lens in the optical axis direction to focus the fundus. In the fundus imaging apparatus, a local region on the image sensor used for detecting the split index image is focused on the focusing area. A storage unit that stores the detection range position information associated with the lens position, and the control unit is configured to control the position of the imaging element based on the position of the focusing lens and the detection range position information stored in the storage unit. A detection range of the split index image at is set.
Claims (3)
前記眼底に対して一対の光学的なスプリット指標を投影するスプリット指標投影光学系と、
駆動機構により光軸方向に移動可能なフォーカシングレンズが光路中に配置され、前記スプリット指標投影光学系により前記眼底に投影された前記スプリット指標像と眼底像とが撮像される撮像素子を備える眼底撮影光学系と、
前記撮像素子の出力信号から前記スプリット指標像の分離状態を検出し、前記検出した結果に基づき前記駆動機構を駆動させてフォーカシングレンズを光軸方向に移動させることで前記眼底のフォーカス合わせを行う制御手段と、
を備える眼底撮影装置において、
前記スプリット指標像の検出のために用いられる前記撮像素子上の局所領域を,前記フォーカシングレンズの位置に対応付けた検出範囲位置情報として記憶する記憶部を備え、
前記制御手段は、前記フォーカシングレンズの位置と前記記憶部に記憶された前記検出範囲位置情報とに基づき,前記撮像素子上での前記スプリット指標像の検出範囲を設定することを特徴とする眼底撮影装置。 A fundus illumination optical system for illuminating the fundus of the subject's eye;
A split index projection optical system that projects a pair of optical split indexes on the fundus;
A fundus photographing that includes a focusing lens that is movable in the optical axis direction by a drive mechanism, and that has an imaging device that captures the split index image and the fundus image projected onto the fundus by the split index projection optical system. Optical system,
Control for detecting the separation state of the split index image from the output signal of the image sensor , and driving the driving mechanism based on the detection result to move the focusing lens in the optical axis direction to perform focusing on the fundus Means,
A fundus photographing apparatus comprising:
A storage unit for storing a local area on the image sensor used for detection of the split index image as detection range position information associated with a position of the focusing lens;
The fundus imaging is characterized in that the control means sets a detection range of the split index image on the imaging device based on the position of the focusing lens and the detection range position information stored in the storage unit. apparatus.
前記検出範囲位置情報は、正視眼の被検者眼に対して前記フォーカシングレンズの位置を光軸上で移動させたときの前記被検者眼に対する画角変化に基づく前記スプリット指標像の投影位置の移動量に基づき決定されることを特徴とする眼底撮影装置。 The fundus imaging apparatus according to claim 1,
The detection range position information is a projection position of the split index image based on a change in an angle of view with respect to the subject's eye when the position of the focusing lens is moved on the optical axis with respect to the subject's eye with a normal eye. The fundus photographing apparatus is determined based on a movement amount of the fundus.
光源から出射された赤外光で照明された前眼部からの反射光を受光して前眼部観察像を得るための前眼部観察光学系を有し、
前記制御手段は、モニタに前記前眼部観察像を表示する状態では、前記眼底照明光学系による眼底への照明を行わない,又は減衰させた状態で前記スプリット指標投影光学系による前記スプリット指標像の投影を行って前記撮像素子上での前記スプリット指標像の受光位置を求めることにより前記検出範囲を設定することを特徴とする眼底撮影装置。 The fundus imaging apparatus according to claim 1 or 2,
Having an anterior ocular segment observation optical system for receiving an anterior ocular segment observation image by receiving reflected light from the anterior ocular segment illuminated with infrared light emitted from a light source;
In the state where the anterior ocular segment observation image is displayed on the monitor , the control means does not illuminate the fundus by the fundus illumination optical system or attenuates the split index image by the split index projection optical system in a attenuated state. The fundus photographing apparatus is characterized in that the detection range is set by calculating the light receiving position of the split index image on the image sensor by performing projection of the above.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011059693A JP5787060B2 (en) | 2011-03-17 | 2011-03-17 | Fundus photographing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011059693A JP5787060B2 (en) | 2011-03-17 | 2011-03-17 | Fundus photographing device |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2012192095A JP2012192095A (en) | 2012-10-11 |
JP2012192095A5 true JP2012192095A5 (en) | 2014-05-01 |
JP5787060B2 JP5787060B2 (en) | 2015-09-30 |
Family
ID=47084595
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011059693A Active JP5787060B2 (en) | 2011-03-17 | 2011-03-17 | Fundus photographing device |
Country Status (1)
Country | Link |
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JP (1) | JP5787060B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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TW201838582A (en) * | 2017-04-06 | 2018-11-01 | 日商興和股份有限公司 | Fundus photography device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06181889A (en) * | 1992-12-15 | 1994-07-05 | Nikon Corp | Focusing detecting device for ophthalmoscope device |
JP3653621B2 (en) * | 1996-05-13 | 2005-06-02 | 株式会社トプコン | Optical system of fundus camera |
JP3839216B2 (en) * | 2000-03-22 | 2006-11-01 | 株式会社ニデック | Fundus camera |
JP4795000B2 (en) * | 2005-11-25 | 2011-10-19 | キヤノン株式会社 | Fundus camera |
JP5059638B2 (en) * | 2008-01-24 | 2012-10-24 | 株式会社トプコン | Ophthalmic imaging equipment |
US8328355B2 (en) * | 2008-01-24 | 2012-12-11 | Kabushiki Kaisha Topcon | Ophthalmic device |
JP5390847B2 (en) * | 2008-12-10 | 2014-01-15 | 興和株式会社 | Fundus photographing device |
-
2011
- 2011-03-17 JP JP2011059693A patent/JP5787060B2/en active Active
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